Metrics on Windows XP

[John Zinky]

Guillaume,

The Host metrics come from a metric service via the SysStat "Data  
Feed", which periodically polls the host OS for system metrics.
For linux this is easy using the /proc file interface.
For Solaris and MacOS we can get the load average by executing the  
program "uptime"
For Windows nothing is easy, (at least for us). We attempted using  
JNI to make Windows system calls, but abandoned that code as unreliable.

If you know of a way to get at Windows OS parameters from java,  
without JNI calls please tell us we can add these calls.  I.E. is  
there a program that we can exec, that is always installed in  
Windows? If you have working JNI code we might look at, but no  
promises. DLL's are a configuration nightmare.

Specifically, we would like to fill in the metrics servlet table  
"$<NODE1>/metrics/resources"
or the Metrics Host Keys
  http://cougaar.cougaar.org/software/latest/doc/OnlineManual/ 
MetricsService/keys.html

The missing metrics are:
LoadAverage (this is the key metric, but Windows does not seem to use  
Load Average (Average number of jobs ready to run).
Cache
TcpInUse
UdpInUse
TotalMemory
FreeMemory

Windows metrics that cougaar currently measures.
Count is obtained via Java System calls
JIPS (Java Instructions per second) is obtained via a micro benchmark  
when the node first starts up.

BTW: You could not find these metrics in the Cougaar code because,  
the Metric Service implementation really is the QuO Resource Status  
Service (quo.bbn.com), so the source code is not available via  
cougaar.org. We are debating on whether to add the QuO RSS source  
code to cougaar. Adding Windows support may be a good excuse to do  
this branch.

On Jul 11, 2007, at 11:43 AM, Guillaume Liegard wrote:

> Hello,
>
> I'm a new Cougaar developper.
>
> I want to know if the metric service can bring me informations  
> about the computer in general.
>   For example, I need the CPU usage of the computer in general (not  
> only the CPU usage of an agent or a node, or the jvm).
>
> Then, the feature must run on Windows XP.
>   And I get "WARN [DirectSysStatSupplier] - No handler for CPU on  
> platform Windows XP", which makes me think it won't work on Windows.
>
> That's why I want to add new metrics, based on native calls.
> So I read the documentation at "http://cougaar.cougaar.org/software/ 
> 12.2/OnlineManual/MetricsService/ ", in particular the section "Add  
> New Metric".
> I look at an exemple of sensor plugin :  
> "org.cougaar.core.thread.AgentLoadSensorPlugin".
> But this sensor get it's values suscribing to the metric service,  
> and there is no metric which can answer my need : Get the global  
> CPU usage on Windows plateform.
>
> Finaly, I look at the "Use Cases and Examples", in particular the  
> "Example Metrics Writer", in order to be able to add my own key.
> When I add a new key, like the "Example Metrics Writer" do with the  
> "Current_Time_Millis" key ; I can't get the value after, because I  
> don't know the path.
> For example, I manage to modify an existing key, like "Host_[Host  
> IP]_CPU_Jips", and get my funny value after because I know the path  
> is "Host([Host IP]):Jips".
> So where can I do the mapping between key and path ? Because the  
> example shows how can I put a key, but not how can I put the path.
>
> -- 
> Guillaume Liégard
>
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